Three problems related to power steering failed have been reported for the 2004 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Sienna based on all problems reported for the 2004 Sienna.
The contact owns a 2004 Toyota Sienna. The contact stated that while driving approximately 60 mph, the power steering assist failed without warning. The steering wheel became hard to turn. The contact also stated that both passenger side windows were inoperable. The vehicle was taken to independent mechanic, who was unable to diagnose the vehicle. The vehicle had not been repaired. The manufacturer was not aware of the problems. The approximate failure mileage was 115,000.
A shaft in the power steering began to fail due to corrosion caused by road salt. Complete failure would have caused the steering to lock up. I replaced the part prior to failure.
2004 Toyota Sienna with 39,000 miles. Steering shaft assembly failed - nearly impossible to maneuver car. Failure occurred suddenly, as if power steering system failed. Failure blamed on rubber boot. Corrective action: steering shaft assembly replaced at consumer cost. Old part is available for government viewing. Sudden failure could have caused loss of vehicle control and accident at high speeds. Toyota refused to cover repair due to my not having 30,000 miles service performed at local Toyota dealership!.